What is the density of an object with a volume of 30ml and a mass of 90 grams
1 answer:
Answer:
<h2>Density = 3 g/mL</h2>Explanation:
Density of a substance can be found by using the formula
<h3>From the question
mass = 90 g
volume = 30 mL
Substitute the values into the above formula and solve for the Density
That's
<h3>We have the final answer as
<h3>Density = 3 g/mL</h3>Hope this helps you
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Answer:
Two Half-lives
Explanation:
Let number of Parent nuclei Initially present be X,
Then, finally Parent nuclei Will remain with
daughter nuclei.
In one half- life , parent nuclei becomes half of initial.
So, starting with X parent nuclei,
After one half-life, it will degrade to .
After another half life , Parent nuclei will become half of
Which is equal to .
So, Parent nuclei have to go through Two half-lives.